President-elect Trump, who campaigned against those rules, would be able to undo most of those rules in his first hour in office, NBC News reported.

If he chooses to do so, Trump can quickly reshape large swaths of American national security policy, much of which is governed by executive orders and presidential policy guidance that can be overridden by the president's signature. That includes U.S. sanctions on Russia, and its recent rapprochement with Cuba.